$\begin {array} {1 1} (A)\;CH_3CH_2Br\: and\: KCN & \quad (B)\;C H_CH_2Br\: and \: NH_3(Excess) \\ (C)\;CH_3CH_2Br \: and \: AgCN & \quad (D)\;CH_3CH_2NH_2\: and\: HCHO \end {array}$
